LED display enabling signal control system, LED display system and display driving method

Abstract

The invention relates to an LED display enabling signal control system. High-frequency display enabling signals in display enabling signals are overlapped in low-frequency display enabling signals to be together transmitted, the transmission frequency is greatly reduced, the low-frequency display enabling signals adopt a carrier similar mode to transmit high-frequency display enabling signals, influences by transmission frequency limitation between LED display units do not exist, signals whose frequency does not exceed the transmission frequency limitation can be used between the LED display units to transmit display data of higher frequency or a lower gray level, and thus, the LED display system refreshing rate is improved. A frequency dividing circuit is used for separating the high-frequency display enabling signals and the low-frequency display enabling signals which are overlapped together before, recovery of the high-frequency display enabling signals and the low-frequency display enabling signals in the LED display unit can be realized, and in the maximum clock frequency of a crystal oscillator adopted by the LED display system, the minimum output disabling width can be adjusted randomly, and a higher display refreshing rate and a higher gray level can be realized.

Description

technical field [0001] The invention relates to the technical field of LED display, in particular to an LED display enabling signal control system, an LED display system and a display driving method. Background technique [0002] In the field of LED display, the pixel color bit width is continuously increasing, and the amount of data that needs to be transmitted is increasing sharply. At the same time, the requirement for refresh rate is also continuously increasing, so that it is required to increase the data transmission speed inside the LED display system, that is, To increase the amount of data transmitted per unit time. According to the LED display driving principle, the width of the display enable signal (minimum output enable width) corresponding to the least significant bit of LED display data is the smallest among all display gray scales, and the smaller the minimum display enable width, the smaller the width of each display enable signal. The smaller the number of...

AI Technical Summary

Problems solved by technology

However, generally speaking, the signal frequency that can be stably transmitted between LED display units cannot exceed 20MHz. The smaller the minimum output enable width, the higher the signal frequency. Therefore, LEDs transmitted by traditional display enable signal transmission methods The minimum output enable width of the displayed data cannot be lower than 50ns

This creates a pair of contradictions. When transmitting LED display data and display enable signals, in order to ensure transmission stability, transmission at too high a frequency cannot be used, and when driving and displaying inside the LED display unit, a higher frequency is required. Display the frequency of the enable signal to increase the refresh rate

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